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How to Charge Supercapacitor Banks for Energy Storage

Authored on: Aug 12, 2014

Technical Paper

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Supercapacitors are adopted as energy storage solutions in a variety of power management applications due to their intrinsic physical characteristics that provide advantages over traditional batteries. In automotive applications such as start-stop systems with regenerative braking, supercapacitors can provide the energy needed to engage the starter to restart the combustion engine as well as accept the kinetic energy recovered during braking. This paper addresses the challenges related to charging these large capacitors, and shows power system designers how to evaluate and select the best system configuration for backup energy storage. A supercapacitor charger solution is demonstrated, with waveforms and detailed interpretations presented.
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WV1800es Posted Dec 19, 2014

On Page 2, the capacitor array yields a maximum operating voltage of 21.6 volts. Charging this capacitor array to 25 volts will present a challenge regarding capacitor longevity.

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WV1800es Posted Dec 19, 2014

On Page 2, the capacitor array yields a maximum operating voltage of 21.6 volts. Charging this capacitor array to 25 volts will present a challenge regarding capacitor longevity. The 12/2.7V 50F array described on page 5 is much more realistic. Changing the example on page 2 to '12 C in series vs. 2 - 6C arrays' will provide continuity to the text.

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